Glasgow Warriors were unable to exact a measure of revenge for their defeat to Leinster in last season's Pro14 final as the Irish province recorded their first win at Scotstoun in seven years.
Leinster beat Glasgow 18-15 at Celtic Park in May and the defending champions made it seven wins from seven to start the new campaign thanks to a 23-10 success.
They fell 10-3 behind as Ruaridh Jackson took advantage of Hugo Keenan's fourth-minute yellow card with a brace, though neither try was converted.
Cian Kelleher scored a pair of tries himself before the interval and as well as adding the extras on both occasions, Ross Byrne slotted over three penalties.
Glasgow could not even claim a losing bonus point as Leinster kept their hosts out during 31 phases of play at the end of the game.
Jason Harries' 81st-minute try earned Cardiff Blues a thrilling 31-28 victory over Benetton Treviso.
Treviso led for much of the contest but only one of their four tries was converted whereas the quartet of Cardiff scores each had the extras added to them.
Connacht kept up the pressure on Conference B leaders Munster with a 24-12 victory over Southern Kings, while Conference A's bottom side Zebre claimed their first win of the season, a 39-12 thrashing of the Dragons.
Elsewhere, the Cheetahs claimed their fourth victory of the season, overcoming the Ospreys 18-13.